#6 X 3/8" A型 自攻螺絲 | 平頭下陷十字槽 | 鋼 三價鋅 (1,000 個/包)

I needed a lot of small screws for mounting brackets, and the fact these come in a 1000-count box saved me a trip to the store. The flat undercut head sits flush with the metal surface, which looks much cleaner than standard screws. For the price, getting this many quality fasteners with a nice zinc

These are perfect for attaching light gauge metal to wood studs; the flat undercut head sits flush without snagging. Exactly the right size for HVAC duct work and the trivalent zinc finish looks clean.

Finally found a pack that actually has consistent threads all the way down—no frustrating jams halfway through. The flat undercut head sits flush without needing to countersink, saving time on metal stud work.